Definition of irrationality in English:
irrationality
nounPlural irrationalities ɪraʃ(ə)ˈnalɪtiɪ(r)ˌræʃəˈnælədi
mass noun1The quality of being illogical or unreasonable.
the sheer irrationality of continuing a policy doomed to failure
count noun once you apply logic to things you are afraid of, you expose their irrationalities
2Mathematics
The quality of a number, quantity, or expression being irrational.
the irrationality of square roots
Definition of irrationality in US English:
irrationality
nounɪ(r)ˌræʃəˈnælədii(r)ˌraSHəˈnalədē
1The quality of being illogical or unreasonable.
the sheer irrationality of continuing a policy doomed to failure
once you apply logic to things you are afraid of, you expose their irrationalities
2Mathematics
The quality of a number, quantity, or expression being irrational.
the irrationality of square roots